Dive into a world of shadows and secrets in 'Whose Shadow is That?' You are a mid-level office worker, Felix, living an ordinary life until you begin receiving cryptic messages about an unsolved murder that took place two decades ago in your seemingly mundane building. As you unravel the mystery, you'll interact with your quirky co-workers, each with their own motives, while navigating a series of dramatic and unforeseen events that blur the lines between reality and paranoia. Your choices determine the fate of those around you, as you race against time to uncover the truth before you become the next victim of the shadows lurking in your office.